include: update Linux headers to 4.21-rc1/5.0-rc1

This is simply running the newly-updated script on Linux, in
order to obtain the new header files and all the other updates
from the recent Linux merge window.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
25 files changed